/* Copyright 2009 Requirements Management System 
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.mags.remas.server;

import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.mags.exception.common.ExceptionHandler;
import org.mags.remas.exception.SingletonExceptionHandler;

/**
 * 
 * @author Mario Gaitan
 *
 */
public class ErrorServlet extends AbstractServlet {
	private ExceptionHandler exceptionHandler = null;
	protected ExceptionHandler getExceptionHandler() {
		if(exceptionHandler==null) 
			exceptionHandler = new ExceptionHandler();
		return exceptionHandler;
	}
	@Override
	protected void doAction(HttpServletRequest req, HttpServletResponse resp)
			throws Exception {
		PrintWriter out = resp.getWriter();
		String message = "Internal error";		
		try {
			Object _exception = getServletContext().getAttribute("exception");
			if(_exception!=null&&_exception instanceof Throwable)
				message = SingletonExceptionHandler.getInstance().getMessage((Throwable)_exception);
		} catch(Exception e) {
			/*IGNORE EXCEPTION*/
		}
		out.print("<html><body><center>"+message+"</center></body></html>");
		out.flush();
		out.close();		
	}
}
